Question: When did Sāo Paulo have a population of 4.50949e+07?
Paraphrase: When did the population of Sao Paulo reach 4.50949e+07?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q175 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '4.50949e+07')) . ?s pq:P585 ?value}